Placing this script in a Drupal clone and running it will generate a YAML list (contrib.yaml) of all the parsable names listed in the logs. As a note, the script will produce some garbage values. The goal behind it was that it was better to have some incorrect items added than it was to inadvertently leave someone off.

Drupal Contributors

require 'yaml'

class Repository
  def messages
    `git log --oneline`.split("\n")
  end
end

class MessageParser
  def initialize(unprocessed_line)
    contributor_regex = /by ([[:alnum:]_,\/ -]+)([.;:|-]|'s)/
    @matches = unprocessed_line.match contributor_regex
  end

  def authors
    @matches.nil? ? [ ] : split_on_break_words(@matches[1])
  end

  private
  def split_on_break_words(original_line)
    original_line.gsub(/( and | et al |\/)/i, ',')
                 .split(",")
                 .map(&:strip)
                 .reject(&:empty?)
  end
end

class ContributionCounter
  def initialize()
    @contributors = Hash.new 0
  end

  def add(entry)
    return if entry.nil?
    entry = [ entry ] unless entry.class == Array
    entry.each { |person| @contributors[person.downcase] += 1 }
  end

  def find_by_user(username)
    @contributors[username.downcase]
  end

  def users
    @contributors.keys
  end

  def contributions
    @contributors
  end
end

repository = Repository.new
contrib_counter = ContributionCounter.new
repository.messages.each { |line| contrib_counter.add MessageParser.new(line).authors }

File.open('contrib.yaml', 'w') { |file| file.write contrib_counter.contributions.to_yaml }